Just place your iphone on the dock port or via usb and just power on the car and play the music on your phone, and it will play for the 3 speaker built in the car.

The car has a mode button were you can select a mode either dock, memory card, aux, or FM radio

very simple to use, just charger the car up by inserting the battery provided, and just keep it charged for every time you want to use it or just keep it pluged in usb port and it will sat powered all the time.